Calculating-machine.



E. 5M-ENZ.

CLULATING MACHINE.` Y A APPLICATION FILED sBPT.1e,1909.

953,622 Patented Mar. 29, 1910.

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E. JAHNZ.

GALGULATING MACHINE. Plnumxrlorr FILED sBPT.1s, 1909.

Patented Mar. 29, 1910.

l 2 SHEETS-SHEET 2.

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ERIIN JAHNZ, OF BERLIN. GER/MANY, ASSIGNGR T0 GEIE/IME, NATALIS d; C0., KOM- MANDITGESELLSCHAFT AUF AYTIEN, BRAUNSCHIJVEIG, 0F BRUNSWICK, GERMANY,

A CORPORATION OF GERMANY.

Specification of Letters Eatent.

Patented Mar. 29, 1910.

Application filed September 16, 1999; Serial No. 518,119.

.To all whom it may concern:

Be it known that I, EnwiN JAHNZ, engineer, subject of the Emperor of Germany, residing at= Berlin, -Province of Brandenburg, Kingdom of Prussia, Empire of Germany, have invented certain new and useful Improvements in Calculating-Illachines, of which the'ollowing is a specification.

My invention 'relates to improvements in calculating machines in which calculations are performed by means' of. setting disks having adjustable teeth or toothed AWheels which transmit the values representedby saidteeth to a registering or counting mechanism:

The object of the improvements is to pro vide novel means for arresting the counting or registering mechanism immediately after transmitting aV .value thereto, so that itcan not 1bethron'fn, by its impact, beyond the desired pjosition.

line Q--2.' 'Fim 3, is a similar cross-section .showing a modification 'of the arresting mechanism, and Fig. 4, is a vertical crosssection of Fig. l taken on the line 4--4 and showing my improved arresting mechanism in combination'y with themechanism for counting the revolutions ofthe machine crank.

itis-shown in the said drawings, 1 indicates the horizontal'base plate of the machine, 2 and 8 indicate the vertical side Walls which are attached to and rise from the sides oi' the said base plate and which atliord r' .support for the shat't 4 of the settin i cchanism. rll`he shaft 4 carries a plurahty f 1cttng disks 6 which are rigidly secured t to. ach of the ISaid settingdisks is pr vided with an annular cam disk 7 having a rotary support. on a/circular concentric shoulder S of its disk G. Each ot' the setting disks 6 has nine radial grooves S) which a1- fordY a sliding support for small teeth 11 having noses 10. The latter project laterally beyond the face of the setting disk 6 and into a cam groove 12 of the cam disk 7. By turning the cam disk 7 by means ot a handle 15 the teeth 11 can be thrown out- Ward beyond the periphery of the setting disk. The teeth represent the values 'to be used in a calculation. To secure the proper adjustment of the said teeth a spring actuated pin 13 is provided for each of the disks 7, which is adapted to engage one of a plurality of not-ches 14 corresponding to each of thesaid teeth. The said pin is constructed with a Wedge shaped liront end,

,and the notches 14 are shaped accordingly. -Thereby the disk 6 can be set only in predetermined positions, in vwhich none of the rigidly connected with disks QQ having the numbers from 1 to 9 and the zero sig-n printed about their peripheries.

The tens carrying mechanism consists of a pin Lf-l secured to the disk which is adapted to rock a lever QG loosely supported on a shaft 25 and locked in oneof its" end positions by a spring actuated pin Q7.

0n each of theV setting disks two teeth 28 and 29 are provided which project beyond the periphery of the said disks and are normally forced out of the plane ot. the teeth 11 by means of springs 30. If the carrying lcver 26 is in its rocked position and the setting disk l is rotated, the tooth 28 engages 'ing disks coperates with a carrying lever'QG which is adapted to engage thc setting disk ofthc next higher order. ,Therefordif a registering wheel passes from nine to zero, the counting disk of the next higher order is advanced into its l. position, so that the number .10 appears on the registering mechanism.

The tooth 28 is used for the carrying operation in case of additions or multiplications in which the crank 1S is turned to the right, while a tooth 29 comes into operation in case of subtractions and divisions in which the crank is turned to the left. As soon as the carrying tooth 28 or 29 has operated, the lever 26 must be rocked backward into its normal position shown in Fig. To eifect this a/cam 3l is provided on each of the setting disks 6 between the teeth 28 and 29, which cam rocks the lever 26 after each operation of the carrying teeth 28 and 29. v

The invention may also be embodied in a calculating machine in which a' 'mechanism for counting the revolutions of the crank is provided, which-mechanism inthe example shown is arranged coaxially with the registering mechanism. The said mechanism consists of a sin le tooth wheel 331 mounted on the shaft 4 ot the setting disks and acting on counting wheels 35 loosely mounted on a shaft 3S. On the periphery of each of thc counting wheels 35 the numbers from 1 to 9 and the zero sign are printed, whereby the number .of the revolutions of the crank is indicated, it the latter is turned either to the right or to the left. At the end of a calculating operation the registering and the revolutions counting mechanisms must be set to zero, for which purpose re-setting mechanisms of the same construction are provided ineach of said mechanisms.

All the registering disks 22 and counting wheels 35 are made in the form of rings,and within the latter rigid abutments 37 are provided which can be carried along by pins 38 secured to the shafts 23 and 3G respectively. By .turning the handles 39 and 40 the shafts are shifted laterally by means of cam faces 4l and 42, and in their shifted positions they can engage the abutments 37. The said abutment is v thus carried along when the shafts are shifted laterally. As soonas themechanisms are brought into their zero positions, the shafts 23 and 36 are shifted backward, so that the pins 38 are disengaged from the abutments 37' of the counting wheels 22 and 35. l Y

The registering mechanism with its inltermediate gears 2O and the carrying levers 26, and the revolutions counting mechanism with the intermediate gears 34 are disposed with their vertical side walls 43 and 44 on a seoarate plate or carriage 32. The said late 32 is guided Within a groove of the se vplate l and-.it -is slidable therein, so that the registering disks and the revolutions countmg wheels can De-brought into en agement with any ofthe setting disks. f

eferrng now to the featuresof construction constituting my 'present invention rod 45 extending longitudinally or" the chine 1s supported 1n the side walls 2- and 3. On saldrod rocking Ilevers 46, one for each of the setting disks i5, are loosely mounted which with their arms 47 normally engage between two consecutive teeth or". the gears 20. Vtfith their opposite arms 43 the5 extend sidewise et the cam disks 7 to a point adjacent. to the path of cam plates 49, 50, 51 and 52. Normally the arms 48 are not engaged by said' cam plates. ,iihewever, a transmission gear 20 is rotated by the setting disk 6 coperating therewith, the arm 4? is forced out of its. position between the teeth of said gear, and the arm 48 is rocked into the path of the cam plates 49, 50, 5l and 52. When the gear 2O has thus been" advanced a distance corresponding to the number of the teeth set on the setting disk 6, the arm 48 is rocked downward by one of the cam plates 49, 50, 51 or 52, and the arm 47 is torced into its looking position between two teeth of the gear 20, so that the later can not be thrown, by its impact, be yond the desired position. The cam plate 49 is secured to the cam disk 7. Therefore if the setting disk'is rotated in the direction of the arrow 53, the abutment. 49 always tends to )force the arm 48 (.lownward, as soon as the last one of the teeth ll has acted on the gear 20. if, however, the setting disk is rotated inthe opposite direction, the cam plate 50 which is secured to the setting disk 6 comes into operation as soon as the irst one of the teeth ll has released the gear 20. The cam plates 5l and 52 act on the arm 48 when carrying operations are performed. As such carrying operations are always effected in the same relative position of the parts, the said cams 'can also be secured to the setting disk 6.

ln the example illustrated in Fig. 3 the rocking lever 46 of the example shown in Figs. l and 2 is substituted by a pair of bell crank levers 54 and 55 pivotally mounted on rods 56 and 57` respectively. 'lihel said llevers are connected with each other'by a spring actuated pin 58 which has the tendency to force the lever 55 into its arresting position, and the lever 54 into the path of the cam plates 49, 50, 5l and 52. In the example shown theelever 55l does not engage the -intermediate gear 20 but the gear 2l.

connected with the registering wheel 22 whichI is loosely mounted on the shait 23.

As shown in Fig-."4 the invention may also be embodied in an arresting mechanisnifor the mechanism 'torleounting the revolutions ofthe machine crank. A disk 331 secured to thef'shatt 4 of the setti'nodisks carries a singlo tooth 33 which is adapted te act on the revolutions counting mechanism by means of intermediate gears 34, .34M As shown the gears 34 and 34? are arrested, hy means o a lever/461 pivotally mounted on the shaft 45 and having arms ,471 and 481. The construction of the lever is the same as that of the leveJr 46 described with reference to Figs. l andeQ. As a single tooth is used for advancinggthe gear 34, only two cam plates 56 and 57 are required which are stationary rela-A tively to the tooth 33, and whichkforce the lever 481 into its locking position within the intermediate gear 34 or the gear connected with the countin wheel 35, as soon as the tooth`33 has acted on the gear 34. The cam .57 comes into operation, if the shaft 4 is Irotated in the direction of the arrow shown,

while the cam 56 comes -into operation, if .the said shaft is rotated in the opposite direction.

In do not broadly claim an arresting mechanism' for the registering wheels of a calculating machine, but an arresting device which is actuated from thesetting mechanism at apoint away from the point of contact between said setting wheel and the gear operated thereby. When so constructing the arresting. device it is not necessary to dispose the same outside of the plane of the gears connecting the setting disks and the,

registering wheels, and to Aprovide on the registering .f wheel a second disk laterally thereof and adapted to be engaged by the locking device.

1. In a calculating machine, a rotary Vvalue transmitting element, a rotary value registering,element,` toothed devices operatively connecting said elements and an arresting device for said registering element arranged between said transmitting element and said toothed devices, means associated with the registering element and engaging -the arresting device to throw it out of lock ing position upon rotation of the registering element, and means associated with the transmitting element engaging the arresting device at a point distant from the toothed devices to throw said arresting device into locking position.

2. In a calculating machine, the combination with a setting disk, a registering wheel1 and agear means operatively connecting the registering wheel with the setting disk, of an arresting device for said registering wheel engaging the gear means and adapted to be thrown out of locking position upon rotation of the registering wheel, and means on said setting diskto throw the arresting ,device into 'locking position, said latter means engaging the arresting device at a. point distant from the said gear means.

3. In a calculating machine, the combination with a setting disk, a registering wheel, and ear means o eratively connecting the wheel and disk, o' an arresting device for said registering wheel engaging the gear means and adapted to be thrown out of locking position upon rotation of the registering wheel, and adjustable means on said setting disk to throw the arresting device into locking position and engaging the said arresting device at a point distant from the gear means, the saidy adjustable means on the setting disk' being movable relatively to said arresting device in accordance with the number ofteeth operatively disposed on the setting disk. Y

4. In a calculating machine, the combination with a setting disk having adjustable teeth, a rotary cam disk mounted thereon and operative to set the teeth, and a registering wheel, of a toothed wheel operatively connecting the setting disk and registering wheel, of an arresting device for said registering wheel engaging the toothed Wheel and adapted to be thrown out of locking position upon rotation of the registering wheel, and means on said cam disk to throw said arresting device into locking position, said means engaging the Alocking device at a point dis- `tant from the point of engagement of the toothed wheel with the setting disk and registering wheel.

5. In a calculating machine, the combination with a rotary value transmitting element, a value registering element, and a gear device operatively connecting the said elements, of a pair of rocking levers, springactuated means connecting said lever, one of said levers normally engaging between the teeth of the gear and adapted to be thrown out of engagement with said teeth upon rotation of the registering element, and means onl said transmitting element adapted to rock the other lever and engaging the latter at a point distant from the point of engagement of theJ gear with the transmitting element and registering element.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ERWIN JAHNZ. Witnesses:

HENRY HAsrER, WOLDEMAR HAUPT. 

